40-Series Represents the Perfect Balance of Performance, Durability and Value Internally Contoured 6061-T6 Aluminum Cups and Cover Innovative Clip-Seal Seals the Top Assembly and Captures the Compression Ring Interlok Spacer Compatible Sealed Black Oxide Steel Cartridge Bearing Consistent Stack Heights Across 10, 40 and 110-Series Internal Parts Are Cross-Compatible Across 10, 40 and 110-Series Attributes Bearing Grade Sealed cartridge Crown Race Diameter 26mm Headset Position Complete Headset Type External, Threadless Headset Weight 89g Lower Cup 30mm Primary Color Black S.H.I.S. EC30/25.4 | EC30/26 SHIS Lower EC30/26 SHIS Upper EC30/25.4 Stack Height 28 Steerer Tube 1'' Upper Cup 30mm
